纤维素/氯化锂/N, N-二甲基乙酰胺溶液的流变性能

doi:10.13475/j.fzxb.20200901808

纺织学报 ›› 2021, Vol. 42 ›› Issue (05): 23-30.doi: 10.13475/j.fzxb.20200901808

纤维素/氯化锂/N, N-二甲基乙酰胺溶液的流变性能

余美琼¹^,², 袁红梅¹, 陈礼辉¹()

1.福建农林大学材料工程学院, 福建福州 350108
2.福建技术师范学院海洋与生化工程学院, 福建福清 350300

收稿日期:2020-09-07 修回日期:2021-01-08 出版日期:2021-05-15 发布日期:2021-05-20
通讯作者: 陈礼辉
作者简介:余美琼(1981—),女,副教授,博士生。主要研究方向为生物质能源与材料。
基金资助:
国家自然科学基金项目(31971612);福建农林大学科技发展基金项目(CXZX2018007);福建农林大学科技发展基金项目(CXZX2017040)

Rheological properties of cellulose/LiCl/ N, N-dimethylacetamide solution

YU Meiqiong¹^,², YUAN Hongmei¹, CHEN Lihui¹()

1. College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350108, China
2. School of Ocean Science and Biochemistry Engineering, Fujian Polytechnic Normal University, Fuqing, Fujian 350300, China

Received:2020-09-07 Revised:2021-01-08 Online:2021-05-15 Published:2021-05-20
Contact: CHEN Lihui

摘要/Abstract

摘要：

为探究纤维素溶液流变性能对其静电纺丝可纺性的影响,研究了纤维素/氯化锂(LiCl)/N, N-二甲基乙酰胺(DMAc)溶液的稳态流变性能和动态流变性能,并在此基础上进行静电纺丝。结果表明:纤维素/LiCl/DMAc溶液为假塑性流体,溶液的表观黏度、稠度系数、结构黏度指数均随着温度的升高而减小,随着纤维素质量分数的增加而增大,而非牛顿指数的变化规律则相反;20~60 ℃温度下,质量分数为2.5%和3.0%的纤维素/LiCl/DMAc溶液的非牛顿指数更接近1,具有较稳定的流变性能,且结构黏度指数较小,更易进行纺丝操作;室温下,质量分数为3.0%的纤维素/LiCl/DMAc溶液更适宜进行静电纺丝。

关键词: 纤维素, 氯化锂/N, N-二甲基乙酰胺, 稳态流变性能, 动态流变性能, 静电纺丝, 可纺性

Abstract:

In order to investigate the effect of rheological properties of cellulose solution on the spinnability of electrospinning, the steady and dynamic rheological properties of cellulose/LiCl/N, N-dimethylacetamide(DMAc)solution were studied,and electrospinning was carried out on this basis. It was found that the cellulose/LiCl/DMAc solutions were pseudoplastic fluid. The research results showed that the apparent viscosity, consistency coefficient and structural viscosity index of the solution decrease with the increase of temperature and increase with the increase of cellulose mass fraction, while the variations of non-Newtonian index were opposite. The non-Newtonian indices of the 2.5% and 3.0% cellulose/LiCl/DMAc solutions were closer to 1 at 20-60 ℃, meaning that the solutions have stable rheological properties. The structural viscosity indices of the 2.5% and 3.0% cellulose/LiCl/DMAc solutions were smaller, making them easier to spin, with 3.0% cellulose/LiCl/DMAc solution the optimal for electrospinning at room temperature.

Key words: cellulose, LiCl/N, N-dimethylacetamide, steady state rheology, dynamic rheology, electrospinning, spinnability

中图分类号:

O636.11

余美琼, 袁红梅, 陈礼辉. 纤维素/氯化锂/N, N-二甲基乙酰胺溶液的流变性能[J]. 纺织学报, 2021, 42(05): 23-30.

YU Meiqiong, YUAN Hongmei, CHEN Lihui. Rheological properties of cellulose/LiCl/ N, N-dimethylacetamide solution[J]. Journal of Textile Research, 2021, 42(05): 23-30.

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温度/℃
温度/℃	2.5%	3.0%	3.5%	4.0%	2.5%	3.0%	3.5%	4.0%
20	8.740	16.361	25.634	43.971	0.812	0.753	0.736	0.702
30	5.293	9.755	16.482	29.827	0.857	0.810	0.772	0.732
40	3.461	7.036	11.863	19.640	0.888	0.834	0.791	0.772
50	2.591	4.393	7.329	13.233	0.874	0.860	0.832	0.799
60	1.969	3.108	5.522	9.557	0.883	0.879	0.842	0.824

温度/℃	Δη
温度/℃	2.5%	3.0%	3.5%	4.0%
20	7.559	9.582	10.216	11.486
30	6.007	7.645	8.943	10.384
40	4.852	6.785	8.246	8.939
50	5.006	5.697	6.778	8.002
60	5.510	4.922	6.297	7.032

纤维素/氯化锂/N, N-二甲基乙酰胺溶液的流变性能

Rheological properties of cellulose/LiCl/ N, N-dimethylacetamide solution

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